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作者根据化工生产及日常生活的实际,作出了三个设计方案:①流体断流报警方案,将一金属簧片放于水管中进行取样,当水管中有水流过时,簧片将报警部分电路电源断开,否则将接通,用光敏二极管进行报警信号取样,发光二级管作为光源,水龙头的开关将开断两二极管之间的光信息（当然有水流过管道时,由于电源被切断,不可能发生报警）,当光敏二极管获得光信号后,振荡电路起振,用指示灯或扬声器进行报警;②流
According to the actual production and daily life of chemical industry, the author made three design schemes: (1) The flow-off alarm program of fluid will put a metal reed in the water pipe for sampling. When there is water flow in the pipe, the reed will alarm part of the circuit power supply Disconnect, otherwise it will be connected, the alarm signal with a photodiode sampling, light-emitting diode as a light source, the faucet switch will break the optical information between the two diodes (of course, water flows through the pipeline, because the power is cut off, not Alarm may occur), when the photodiode to obtain optical signals, the oscillation circuit starts with the lights or speakers to alarm; ② flow